Journal
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
Volume 54, Issue 15, Pages 1530-1536Publisher
WILEY
DOI: 10.1002/polb.24048
Keywords
antioxidants; conducting polymers; imidazole; neutralization; PEDOT:PSS; thin films; transparent conductor
Categories
Funding
- Nano-Material Technology Development Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning of Korea [NRF-2014M3A7B4050960, NRF-2014M3A7B4051745, NRF-2014M3A7B4051749]
- Priority Research Center Program through the NRF - Ministry of Education, Science, and Technology [2009-0093823]
- National Research Foundation of Korea [2009-0093823, 2014M3A7B4051749] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) has been studied for a wide range of applications due to its potential as a transparent electrode. Herein, the use of imidazole and its derivatives as a neutralizing additive for PEDOT: PSS dispersion and in-depth studies of their effects in terms of electrical properties and stability is reported. Although the neutralization in general reduces the electrical conductivity of PEDOT: PSS, the conductivity after imidazole treatment (685.2 S cm(-1)) is higher than that after treatment of other derivatives. Spectroscopic and thermoelectric studies show that the de-doping effect resulted in the conductivity reduction. As a trade-off of the conductivity reduction, greatly enhanced long-term stability and noncorrosive characteristics are obtained after neutralization. The change in sheet resistance of imidazole-treated PEDOT: PSS after 500 h under harsh conditions (85 degrees C and 85% humidity) is half that of the untreated samples, demonstrating the great enhancement of the stability. (C) 2016 Wiley Periodicals, Inc.
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